However, the GO command is totally obsolete. In general any GO SOMETHING is simply replaced by the equivalent command SOMETHING: e.g. type VIEW instead of GO VIEW. GO PLOT (or its variants GO BIT, GO NICE and GO MAP) and GO UVSHOW are replaced by the SHOW command, which offers many more possibilities.
The capabilities given by the INPUT MAPPING command have in general be replaced by the more flexible use of the question mark ( ?, or ??, or even ???) as arguments to individual IMAGER commands. Most commands display their control parameters with such arguments.
Take a little time to browse through HELP SHOW and HELP VIEW to get familiar with IMAGER display capabilities.